Stamping tool for keys



Nov. 5, 1929. G. RINGELHAN 1,734,881

STAMPING TooL FOR KEYS Filed Sept, 28, 1926 Patented Nov. 5, 1929 GUSTAV RllGELHAN, OF DRESDEN, GERMANY STAMPING TOOL FOR KEYS Application. filed September 23, 1326, Serial No. P8525, and in Germany October 2, 1925.

This invention relates in general to stamping tools for striking up portions of fiat metal keys so as to 'form projecting curves on the same. The struck up curve-shaped projections on different keys are situated at different points of the key bits and thereby a great variety of keys is obtained.

The present invention provides a stamping tool for making such keys and is shown in the drawing in which Fig. 1 is a iront view of the top and bottom parts ot' the stamping'tool, l

Fig. 2 is a top view et the bottom part of the stamping tool with positioning plate for positioning the key blank,

Fig. 3 is a top view of the bottom part ci the stamping tool with positioning plate and the key blank removed,

Fig. 4 is a section through Fig. 1 on a plane extending at right angles to the surface of the drawing,

Fig. 5 is a section through Fig. 1 on a plane extending parallel to the surface of the drawing and F ig. 6 is a plan view and side view of a key, portions of which have been struck up by the stamping tool so as to 'torni projecting curves.

As shown in Fig. 1 the tool comprises an upper part or pa'trix 1 and a bottom part or matrix 2. The patrix 1 and matrix 2 are each formed with arecess with removable front and rear walls, the ircnt walls each being fastened by tour screws asshown in Fig. 1. Each said recess or chamber is divided into two halves by a middle dividing plate which extends 'from the front to the rear wall or plate ot the chamber as shown in Fig. 3. The lower part or matrix 2 is iormed with flanges 3 by which. can be fastened on the bed oi a press or the like, and the upper part or patrix 1 has a shaft 4 by which it can be lixed in the ram oi the press.

Extending from the front to the rear end of cach compartment ot the recess in the matrix is a screw spindle 5 which is journalled in the front and rear plates or walls I of the chamber and which can be turned by handles 6. Each screw spindle 5 engages with the internal. thread ot' ay slide 7 that can be moved longitudinally in its compartment by turning the handle 6. Embedded in the iiank of each slide 7 is a bar 8 which joins a slide 7 in the matrix with a similar slide in the upper part or matrix 1. Fixed in the inner flank of cach slide 7 is a pin 9. In the periphery of each handle 6 there is anotch 10 that cooperates with a holding pawl 11. Extending beside the inner flanks ot' the slides 7 are two stamping members in the form of plates 12. These two plates 12 and the middle dividing wall of plates between the two compartments form the cutting or kstamping members of the matrix. They are coupled to their respective slides by being slipped onto the pins 9. The said parts 7, 12 etc. in the compartments are fixed therein by means of screws 13. The member for positioning a key blank in the matrix is made in the form of a plate 14 with slots 15 for receiving the connecting members or bars 8 between the slides in the patrix and matrix. The positioning plate 14 also has a. long notch 16 which receives the key blank 23. A middle line drawn lengthwise through the notch 16 lies beside a middle longitudinal line through the chamber in the matrix and the distance between the two lines is equal to the lateral distance between two curves or projcctions 24 struck up from the blank, Fig. 6.

The chamber and the parts therein in the upper part or patrix 1 are similar to they chamber and corresponding parts in the matrix except that the slides are slipped over smooth guide bars 17 andthe connecting bars 8, instead of being fixed in recesses in the outside flanks of the slides 7, are adapted to slide up and down in recesses 18. The stampingmembers 19, Fig. 5, in the patrix have projections 20. The middle plate and other adjacent plates in t-he patrix have recesses 21. i

When the tool is ixedin position in the press the connecting bars 8 prot-rude into the channels 18. The stroke of the press is such that the bars 8 never leave the channels 18. Stamping plates 2O are maintained above the bottom stam ing plates or matrix cuttingy plates 12. Wilken the bottom slides 7 with their associated plates 12 are shifted the bars CTI 8 cause the slides in the top part'ior patrix l and their associated stamping plates to execute corresponding movements. A complete travel ot the slides is subdivided into ten sections numbered O to 9. Une such section corresponds to one-turn of a handle Y6 from the position in which its notch l0 is engaged by its holding pawl l1 to the next position in which the pawl drops into the notch. In the foremost or Zero position of the slide thev numeral 0 on a number disk 22 belonging to the slideL will be in its topmost position as shown in Fig. 3.

then the slides have been set to the desired number on the number disks 22 the screws are made tast andthekey blank 23 is then slipped into the notch 1G whereupon the stamping members 200i" the patrix strike curve-shaped projections 25: out lof the Aflat metal the blankand torce them into the cutting members l2 in the matrix. ySuch projections2l can be struck up from both sides lines of projections 24 ylying beside one an-v Y other will be produced; rlhe number ot pro-- jections lying beside one another can be changed at will.

It is necessary to have the 'middle line oit the long notch 16 out ot the middle ot the chamber in the matrixbecause when the key blank too 11 part or patrix l is forced downwards. The

Y movements of aV strip in the matrix to be accompanied by corresponding movements of a strip in the patrix, and recessed spacing members between the .lonoitudinall movable strips'in the patrix'and matrix, the recesses 4in the spacing members being adapted to receive portions of the key blank that have been struck up by said stamping members.

. 3. A tool for making keys ot the kind dcscribed comprising a matrix, a patrix, a plate with a slot. for receiving and positioning the key blank in the matrix, adjustable stamping s' members in the matrix and patrix whose positions with respect to the slot in :said plate can j be changed, whereby material can be struck up out oi' any desired part of the key blank,

the middle line extending through said slot,

in the direction in which the key blank slipped into it, being out ot coincidence with i the middle line or axis of the matrix, whereby a. reversal of the key blank in saidslot results in diiqerent parts `ot the key blank l sing struck up by thc stamping members, substantially as described.

in testimony whereof I have affixed my sig` nature.

GUSTAV RINGELHAN.

is turned over tor the purpose otstriking up:

projections from' its second side, different lines from those already struckup by the projections 20 have to be presented to, or placed beneath, said stamping members 20.

Further citferences in the keys produced can be obtained by using different lengths or breadths ot the struck up curves or by changing the spacing between adjacent lines ot curves.

l claim j Y l. A tool Yfor making keys ot the kind described comprisinga matrix; a pat lx; .ieans for positioning a key blank in the tool g stamping members consisting Yot movable recessed strips in the matrix, lon gitadinally movable strips in the patrix, and projections on the latter strips that correspond to recesses in the strips the matrix; and a connecting member between the strips inthe matrix and inthe patrix Vtor causing movements ot a strip in the matrix to be accompanied by corresponding movementsof'a strip in the patrix.

scribed comprising a matrix; a patrix; means for positioning a key blank in the tool; stamp- V ing members consisting'of/'longitudinally' movable recessed strips in the matrix, longilongitudinally s 

